The retail trade union is holding action days at three of the fast fashion retailers’ sites – Boohoo headquarters in Manchester, Burnley town centre and the Boohoo warehouse in Burnley.

An inquiry last year by the environmental audit committee led by Creagh called for a change in the law to incentivise fashion retailers to operate sustainably and punish those that do not.

In a letter to Boohoo co-founder Carol Kane Creagh said: I am writing to you following media reports that Usdaw continue to experience difficulties in establishing trade union recognition discussions with Boohoo.